Weather-strip.



G. H. TIBBITTS. WEATHER STRIP. Arnwulon rmm No.20, 1907.

Patented July 13, 1909:.

'INVENTOR ATO Y WITNESSES:

OFFICE.

CHARLES H. TIBBITTS, OF SAGINAW, MICHIGAN.

WEATHER-STRIP.

Specification of Letters Patent;

Patented July 13, 1909.

Application filed December 20, 1907. Serial Nd. 407,289.

To all whom it may concern.

Be it known that I, CI-IAnLns I-I. TIBBITTs, a citizen of the United States, residing at Saginaw, in the county of Saginaw and State of Michigan, have invented certain new and useful Improvements in feather-Strips; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to weather strips for winc ows, one object of which is to provide such a construction which does not have to be nailed down, but may be held in place by the parting bead without having to out or kerf the latter laterally.

Another object attained is that warping of the sash does not affect the operation of the strip.

Still another object attained is that the strip does not gouge or cut into the sash when the latter is raised and lowered.

A still further object is the provision of a water-ti ht joint.

A furt ier object is the reduction of friction caused by raising and lowering the sash.

Another object is that the strip may be applied to any window without cutting away or butchering the sash.

Soot will work its way under the sash even though there is no draft. My invention absolutely prevents soot from working around the window sash into the room.

With these and other objects in View, my invention consists in certain novel features and combinations, such as will be more fully described hereinafter and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a view partly in cross-section showing my invention applied to a window; Fig. 2 is a similar view taken on line a-a of Fig. 1 and Fig. 3 is a detail of the joint connection at the corners of the window jambs and sill.

There are many disadvantages inherent in weather strips now on the market. One of such strips consists merely in a flat base having a rib projecting therefrom. It is necessary to nail such base to the sill and jamb when securing it in position. The nails wrinkle or warp the metallic base to such an extent that air and soot can find their way into the house beneath the base. I avoid this disadvantage by flanging the base of the strip, such flange receivable in kerf in the sill or in the groove formed in the jamb to receive the parting bead. Again, it has been customary to form the rib of but one thickness of metal, making a flimsy weak construction. Such single thickness invariably catches in the kerf formed in the sashes if there is a single splinter or if the sash warps a trifle. With a rib of double thickness I provide a strong smooth construction incapable of catching on splinters or cutting into the walls of the sash kerf. Furthermore, in some strips it has been common to corrugate the base. This results in reducing the effectiveness of the strip as an air-excluding medium and besides, requires that the window sash be butchered or reduced in thickness to accommodate the increased thickness of the strip.

In my construction, I preferably provide a smooth base which extends across the jamb, the full width of the sash to reduce the friction between the wooden surfaces of the sash and jamb. By making the height of the rib approximately equalto the heights of the parting bead and inside stop, it is unnecessary to pack pasteboard behind the strip to take up the clearance caused by the shrinkage of the sash. Such packing soon rots away and the strip becomes loose and inoperative. Another feature is that in. many weather strips rain can pass through the strip at the corners of the window because a wind and water-tight joint is not formed. I11 my construction I, provide a joipt which is absolutely windand. watertig 1t.

Referring to the drawings, (A) indicates the jamb, and (B) the sill of any suitable window frame. The sill and amb are pro vided with the usual inside stop (1) and the jamb is equipped with the usual parting head. or stop (2) between the sashes, such bead. being customarily set in a groove (3) formed in the jamb. A. blind stop (4) may also be secured to the outer edge of the jamb. The sash is indicated by dotted lines at (5).

My invention comprises a single metallic strip do ubled or folded intermediate its longitudinal edges to form a rib (6) ofdouble thickness, one longitudinal edge of the strip being bent at right angles to the base (7 to form a flange (8).

In applying my invention to a window, a kerf (not shown) is formed in the vertical and lower rails of the sash to receive the ribs (6). This is the usual custom and needs no extended description. The flange (8) of the vertically-extending strip is received in the groove (3) occupied by the parting bead and is frictionally retained therein by the parting bead, it being unnecessary owing to the slight thickness of the metal to either cut away the parting bead or the wall of the groove. The opposite longitudinal edge of the strip is received. beneath the inside stop (1), by which it is held down. It is obvious that a draft can not enter around the sash. The wind can not enter beneath the parting bead because the latter is set in a groove, nor can it enter between the sash rail. and the jamb on account of the rib (6), which is at all times received in the kerl' in the sash rail.

In applying the strip to upper sashes, the flange (8) is located in the groove receiving the parting bead and the opposite edge of the strip is held down beneath the blind stop (4), as will be obvious without illustration. It will be noted that the smooth base extends clear across the width of the sash to reduce friction. In applying the strip to the sill (B), a kerl' is formed longitudinally of the sill to receive the flange (8) ol' the strip, the double rib being received in the kerl' (not shown) formed in the lower rail of the sash and the inner longitudinal edge of the strip is held down by the inside stop. The strips for the jambs and sills are exactly the same and operate in the same manner to exclude drafts. As an additional precaution to retain the sill strip in place it may be nailed between the flange and the rib, as shown In order to prevent the passage of water at the corners of the sash, I provide the following water-tight oint. The lower end of the rib on the vertically-extending strip is opened up or spread apart in a manner substantially as shown in the drawings, with p articular reference to Fig. 3. Also the outer edge of the rib is cut away or slitted, as at (10), to fit over the rib ol' the sill strip, the walls of the rib on the jamb strip embracing the end of the rib of the sill strip.

From an inspection of the drawings, it is obvious that water will be shed by the vertical rib at the joint, the horizontal rib extending from j amb to jamb of the window, and being received within the vertical rib forms a windand water-tight joint, not found in other weather strips.

In my construction, I do not depend upon the joint between the blind stop and the outer edge of the weather strip to prevent the wind from entering around the upper sash, as oft-times the blind stop is only nailed to the jamb and the wind can enter beneath the weather strip, but the flange entering the parting bead groove absolutely prevents the entrance of wind in my construction.

It is obvious that I have combined the advantages of former constructions while omitting their disadvantages, and by so doing I have produced a strip possessing functions not present in any of the constructions now on the market.

Having thus fully disclosed my invention, what I claim as new is 1. The combination with a grooved window j amb, a parting bead seated in the groove, a stop spaced apart from the bead, and a lierfed sash received between the bead and stop, of a nailless weather strip comprising a base, one longitudinal edge of which is received and held between the stop and the j amb, the opposite longitudinal edge of the base being flanged at an angle to the base, the flange received and held in the groove with the parting bead, the entire space between the bead and stop being covered by the base, and a double walled rib integral with and projecting from the base intermediate the flanged edge and the opposite longitudinal edge, the rib being spaced apart from the flange and received in the kerf in the sash, the stop and bead constituting the sole means for retaining the strip in position.

2. The combination with a window frame comprising grooved jambs, parting beads seated in the grooves, stops spaced apart from the beads, a kerfed window sash received between the beads and stops respectively, and a kerfed sill, of nailless weather stri s a plied to the j ambs and sill respective y, t 1e strips each comprising a flat base, a double walled closed rib formed integrally with and projecting outwardly at an angle to the base intermediate its longitudinal edges, the rib received in a kerf in the sash, one longitudinal edge of the base lying flush with the plane of the base and received and held beneath the stop, the opposite longitudinal edge of the base flanged at an angle thereto and extending inwardly, the flange being s aced apart from the rib, the flanged edge of the strip on the jamb received and held in the groove with the parting bead, the flanged edge of the strip on the sill being received and held in the kerf in the sill, the lower outer edge of the rib of the jamb strip being slitted to receive and embrace the end of the rib on the sill strip.

In testimony whereof, I aflix my signature in presence of two witnesses.

CHARLES II. TIBBITTS.

Witnesses:

N. M. ANGUS, RALPH S. WARFIELD. 

